1. To discard or do away with.
2. To discharge with dishonor, as in the army.

ETYM French caissier, from caisse. Related to Cash.
1. One who has charge of money in a store or bank; a cash keeper.
2. Person who operates a cash register in a store, tallying up the amount owed.
3. One that has charge of money: as a high officer in a bank or trust company responsible for moneys received and expended; one who collects and records payments; an employee (as in a store) who handles monetary transactions.